Since 2020, the youth competition system (JWS) has been in the DBV with a uniform nationwide ranking. A comprehensive evaluation shows that the JWS ranking lists are at least as reliable for young athletes as the earlier system-even better.
With the introduction of the youth competition system (JWS) 2020, the German Badminton Association pursued the goal of bringing together different regional ranking lists and creating the comparability of play results nationwide. In order to check the practical effectiveness of the system, tournament and ranking data data were systematically analyzed. The central question was: How well the new ranking lists reliably reflect the actual skill level?
What has changed the JWS
Table of Contents
The JWS summarizes the best five tournament results of the past twelve months in a discipline ranking and differentiates points according to age groups (U9 – U19) and after tournament levels (A – E). This is intended to create a uniform, transparent and comparable ranking structure, which also takes into account age transitions and different tournament qualities.
How the quality was measured
The so -called Match Prediction Accuracy was chosen for the assessment – the proportion of games in which the player placed in the ranking gains the match. This method evaluates every single game and is therefore more fine-meshed and more robust over outliers than a pure before/after comparison of seedlists and final placements. In sports literature, values of around 65–75 % are considered an indicator of a well -functioning ranking.
Core results
- Comparison with the previous system: The comparison of the A-RLT tournaments (U15-U19) from January-June 2025 with A-RLT tournaments from autumn 2018 shows that the JWS values are equal-in some cases the mean values are even slightly above the old values. This suggests that the JWS ranking lists are at least as realistic as the former system.
- Tournament level differences: The weighted mean values were predominantly in the very good area at higher levels (A/B); On B-RLT there were strong values in most competitions. B. the girl-in-chief U13 with about 61 % expected victories, which was due to some overvalued players. Smaller tournaments (C/D/E) often showed extreme deviations – often an effect of very small fields of participants.
- Interpretation of deviations: Individual outliers are expected and not only a proof of a faulty system; Permanent, wide deviations in whole competitions are relevant. In very small fields, 0 % or 100 % expected victories can arise and must be contextualized.
Observed adjustments and their effect
The JWS is not a static set of rules – during 2020-2024 several selective adjustments were made and observed:
- At the beginning of 2021, conditions between age groups (e.g. U11: U13, U13: U15) were changed because younger players tended to be classified too high.
- On January 1, 2024, the focus was reduced from the relevant list from the relevant list to limit “tournament tourism”.
Methodological strengths and limits
The chosen match prediction method is robust and is well suited for system-wide rating because each match is included and the measurement is insensitive to outliers. Restrictions arise from the availability of the data (some historical formats required intensive preparation effort) and by small fields of participants, which are difficult to interpret statistically. Further refinements (e.g. weighting according to the enemy strength or time series analyzes over 6–12 months) would be possible and would further increase the meaningfulness.
Meaning for clubs, trainers and players
- For clubs and trainers: The ranking lists offer a resilient basis for settings, talent seal and training planning – but are to be understood as one tool.
- For players and parents: The system creates transparency and comparability across regions; Individual surprising results remain desired and are not a lack of quality of the rankings.
The evaluation confirms that the JWS performs its task – the nationwide comparability and a realistic image of youth play strengths. The methodology has proven to be practical and enables selective problem areas to be identified and corrected data -based. In perspective, methodological depressions (e.g. greater weighting of opponent quality, tracking of player developments) are conceivable in order to make the system even more meaningful.
Key Findings: JWS Performance at a Glance
To provide a clearer understanding of the JWS’s performance, we’ve summarized the key data points in the table below. This allows for easy comparison adn highlights the system’s strengths and areas for potential betterment.
| Metric | Description | Value/Observation | Significance |
| ———————————— | ————————————————————————————————————– | ———————————————————————————————————————————————————————– | ————————————————————————— |
| Match Prediction Accuracy (MPA) | Percentage of matches where the higher-ranked player wins. | 65-75% (considered indicative of a well-functioning ranking system) | Indicates reliability and predictive power of the JWS. |
| Comparison with Previous System | Performance comparison of the JWS with the older ranking system. | JWS values are equal, or in some cases, slightly above the old values (A-RLT tournaments Jan-June 2025 vs. Autumn 2018). | Demonstrates at least equal, and possibly superior, accuracy and fairness. |
| tournament level Differences | Variation in MPA across different tournament levels (A, B, C, D, E). | Higher levels (A/B) generally show very good MPA. Lower levels (C/D/E) show more extreme deviations, often due to smaller participant fields. | Highlights the importance of considering tournament level when interpreting rankings. |
| U13 Girls on B-RLT Expected Victories | analysis of U13 Girls matches against the ranking | About 61% expected victories | Indicated of potential overvaluation of some players |
| Adjustments and Impacts | Changes made to the JWS and their observed effects. | Adjustments made for age group classifications in 2021, and focus reduction to limit “tournament tourism” on Jan 1, 2024. | Represents the system’s dynamic nature and responsiveness to identified issues. |
| Data Limitations | Factors that influence the system’s performance. | Data availability (historical data preparation) and small participant fields in lower-level tournaments. | Highlights the need for context when interpreting results. |
| Future Refinements | Potential improvements to enhance the JWS’s accuracy. | Weighting opponent strength, time series analyses over 6-12 months, and other potential developments. | shows the ongoing commitment to improve system efficacy and relevance. |
Frequently Asked Questions (FAQ)
To address common reader inquiries and enhance understanding of the JWS, we’ve compiled a detailed FAQ section:
Q: What is the JWS?
A: The Youth Competition System (JWS) is a nationwide ranking system introduced by the German badminton Association (DBV) in 2020. It aims to create a uniform and comparable ranking structure for youth badminton players across different regions, incorporating tournament results and age group classifications.
Q: How is a player’s ranking determined in the JWS?
A: The JWS takes into account a player’s best five tournament results from the past twelve months. Points are awarded based on the tournament level (A-E) and the player’s age group (U9-U19).This is to ensure equal prospect for players of every age group.
Q: How is the quality of the JWS assessed?
A: The efficiency of the system is evaluated using “Match Prediction Accuracy” (MPA), which measures the percentage of matches where the higher-ranked player wins. Values around 65-75% are considered indicative of a robust, well-functioning ranking system.
Q: How does the JWS compare to the previous ranking system?
A: Comparisons of A-RLT tournaments show that the JWS values are generally equal to, or in some cases, slightly above the values of the old system, indicating that JWS provides an equally reliable, if not better, reflection of player skill.
Q: Why do smaller tournaments (C/D/E levels) sometimes show more significant deviations in MPA?
A: Smaller tournaments, particularly at the C/D/E levels, often have fewer participants. This smaller field size makes the results more susceptible to outliers and can lead to more extreme deviations in the Match Prediction Accuracy (MPA) making them less reliable in the standings.
Q: Are individual surprising results in tournaments a sign of a faulty ranking system?
A: No. Individual surprising results are a natural part of sports. Thay do not necessarily indicate a flaw in the ranking system. The JWS aims to provide an overall accurate reflection of player skill, while still allowing for unexpected outcomes.
Q: What adjustments have been made to the JWS as its introduction?
A: Several adjustments have been made, including changes to age group classifications in early 2021 and a reduction in the focus to try to limit “tournament tourism.” These adjustments aim to improve the system and the match results of the players.
Q: what are the benefits of the JWS for clubs, trainers, and players?
A: For clubs and trainers, the JWS offers a reliable basis for talent identification, team selection, and training planning. For players and their parents, the system provides transparency and comparability across regions.
Q: What future refinements are planned for the JWS?
A: Potential future refinements include weighting opponent strength, implementing detailed time series analyses to track player advancement over longer periods, and other methodological enhancements. These refinements are designed to make the system even more accurate and valuable.
